/* roulang page: index */
:root {
            --jm-primary: #0284c7;
            --jm-primary-dark: #0369a1;
            --jm-primary-light: #e0f2fe;
            --jm-secondary: #0f172a;
            --jm-dark-bg: #070d19;
            --jm-dark-card: #0d1527;
            --jm-neon-accent: #00f2fe;
            --jm-neon-glow: rgba(0, 242, 254, 0.45);
            --jm-bg-light: #f8fafc;
            --jm-bg-white: #ffffff;
            --jm-text-main: #1e293b;
            --jm-text-muted: #64748b;
            --jm-border-color: #e2e8f0;
            --jm-card-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
            --jm-card-shadow-hover: 0 20px 30px -10px rgba(2, 132, 199, 0.15), 0 10px 15px -5px rgba(15, 23, 42, 0.04);
            --jm-radius-sm: 8px;
            --jm-radius-md: 14px;
            --jm-radius-lg: 20px;
            --jm-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Reset & Base */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--jm-bg-light);
            color: var(--jm-text-main);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--jm-transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* Dark Neon Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background-color: var(--jm-dark-bg);
            border-bottom: 1px solid rgba(0, 242, 254, 0.2);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), 0 0 15px rgba(0, 242, 254, 0.1);
        }
        .navbar {
            padding: 0.85rem 0;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #ffffff !important;
            font-weight: 800;
            font-size: 1.5rem;
            letter-spacing: -0.5px;
            text-transform: uppercase;
        }
        .brand-neon-badge {
            background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
            color: #070d19;
            font-size: 0.75rem;
            font-weight: 900;
            padding: 3px 8px;
            border-radius: 4px;
            box-shadow: 0 0 10px var(--jm-neon-glow);
        }
        .brand-text {
            color: #ffffff;
            text-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
        }
        .navbar-nav .nav-link {
            color: #94a3b8 !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.5rem 1rem !important;
            position: relative;
            transition: var(--jm-transition);
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: #ffffff !important;
            text-shadow: 0 0 8px var(--jm-neon-glow);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 1rem;
            right: 1rem;
            height: 2px;
            background: var(--jm-neon-accent);
            box-shadow: 0 0 8px var(--jm-neon-accent);
            border-radius: 2px;
        }
        .btn-neon-action {
            background: linear-gradient(135deg, #00f2fe 0%, #0284c7 100%);
            color: #ffffff !important;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            box-shadow: 0 0 15px rgba(0, 242, 254, 0.35);
            transition: var(--jm-transition);
        }
        .btn-neon-action:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(0, 242, 254, 0.6);
            color: #ffffff;
        }

        /* Section Global Standards */
        .section-padding {
            padding: 85px 0;
            position: relative;
        }
        .section-white {
            background-color: var(--jm-bg-white);
        }
        .section-light {
            background-color: var(--jm-bg-light);
        }
        .section-dark-contrast {
            background-color: var(--jm-dark-bg);
            color: #ffffff;
        }
        .section-header {
            margin-bottom: 50px;
        }
        .section-eyebrow {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--jm-primary);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 12px;
            background: var(--jm-primary-light);
            padding: 4px 14px;
            border-radius: 30px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--jm-secondary);
            line-height: 1.3;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--jm-text-muted);
            margin-top: 14px;
            max-width: 780px;
        }

        /* Custom Buttons */
        .btn-jm-primary {
            background-color: var(--jm-primary);
            color: #ffffff;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--jm-radius-sm);
            border: 1px solid var(--jm-primary);
            box-shadow: 0 4px 14px rgba(2, 132, 199, 0.25);
            transition: var(--jm-transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-jm-primary:hover {
            background-color: var(--jm-primary-dark);
            border-color: var(--jm-primary-dark);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(2, 132, 199, 0.35);
        }
        .btn-jm-outline {
            background-color: transparent;
            color: var(--jm-secondary);
            font-weight: 600;
            padding: 12px 26px;
            border-radius: var(--jm-radius-sm);
            border: 1px solid var(--jm-border-color);
            transition: var(--jm-transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-jm-outline:hover {
            border-color: var(--jm-primary);
            color: var(--jm-primary);
            background-color: var(--jm-primary-light);
        }

        /* Cards Standard */
        .jm-card {
            background: var(--jm-bg-white);
            border: 1px solid var(--jm-border-color);
            border-radius: var(--jm-radius-md);
            padding: 32px 28px;
            box-shadow: var(--jm-card-shadow);
            transition: var(--jm-transition);
            height: 100%;
        }
        .jm-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--jm-card-shadow-hover);
            border-color: rgba(2, 132, 199, 0.3);
        }

        /* Hero: Magazine Multi-column Layout */
        .hero-magazine {
            background: linear-gradient(180deg, #f0f7ff 0%, #f8fafc 100%);
            padding: 80px 0 70px;
            border-bottom: 1px solid var(--jm-border-color);
        }
        .hero-issue-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #ffffff;
            border: 1px solid #bfdbfe;
            color: #0369a1;
            font-size: 0.85rem;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: 30px;
            box-shadow: 0 2px 6px rgba(2, 132, 199, 0.08);
            margin-bottom: 24px;
        }
        .hero-title {
            font-size: 2.75rem;
            font-weight: 900;
            color: #0f172a;
            line-height: 1.25;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero-title span {
            color: var(--jm-primary);
        }
        .hero-desc {
            font-size: 1.08rem;
            color: #475569;
            line-height: 1.75;
            margin-bottom: 32px;
        }
        .hero-badges-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 30px;
        }
        .hero-badge-item {
            font-size: 0.82rem;
            color: #334155;
            background: #ffffff;
            border: 1px solid #cbd5e1;
            padding: 5px 12px;
            border-radius: 6px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .magazine-panel {
            background: #ffffff;
            border: 1px solid #cbd5e1;
            border-radius: var(--jm-radius-lg);
            padding: 24px;
            box-shadow: 0 20px 35px -10px rgba(15, 23, 42, 0.08);
            position: relative;
        }
        .magazine-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--jm-border-color);
            padding-bottom: 14px;
            margin-bottom: 20px;
        }
        .magazine-vol {
            font-weight: 800;
            color: var(--jm-primary);
            font-size: 0.9rem;
            letter-spacing: 0.5px;
        }
        .magazine-featured-card {
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: var(--jm-radius-sm);
            padding: 16px;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: var(--jm-transition);
        }
        .magazine-featured-card:hover {
            border-color: #38bdf8;
            background: #ffffff;
            transform: translateX(4px);
        }
        .magazine-cover-box {
            width: 70px;
            height: 90px;
            background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
            border-radius: 6px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: #ffffff;
            font-weight: 800;
            font-size: 0.75rem;
            flex-shrink: 0;
            text-align: center;
            padding: 6px;
        }
        .magazine-meta-title {
            font-size: 1rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 4px;
        }
        .magazine-meta-sub {
            font-size: 0.8rem;
            color: #64748b;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .magazine-meta-tags {
            display: flex;
            gap: 6px;
        }
        .magazine-pill {
            font-size: 0.72rem;
            padding: 2px 8px;
            border-radius: 4px;
            background: #e2e8f0;
            color: #475569;
            font-weight: 600;
        }

        /* KPI Banner */
        .kpi-section {
            background-color: #ffffff;
            padding: 50px 0;
            border-bottom: 1px solid var(--jm-border-color);
        }
        .kpi-card {
            text-align: left;
            padding: 16px 20px;
            border-left: 3px solid var(--jm-primary);
        }
        .kpi-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: #0f172a;
            line-height: 1.1;
            margin-bottom: 6px;
            letter-spacing: -1px;
        }
        .kpi-unit {
            font-size: 1.1rem;
            color: var(--jm-primary);
            font-weight: 700;
        }
        .kpi-label {
            font-size: 0.95rem;
            font-weight: 700;
            color: #334155;
            margin-bottom: 4px;
        }
        .kpi-text {
            font-size: 0.82rem;
            color: #64748b;
            line-height: 1.4;
            margin: 0;
        }

        /* Feature Matrix */
        .feature-icon-wrapper {
            width: 54px;
            height: 54px;
            background: var(--jm-primary-light);
            color: var(--jm-primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            margin-bottom: 20px;
        }
        .feature-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--jm-secondary);
            margin-bottom: 12px;
        }
        .feature-desc {
            font-size: 0.92rem;
            color: var(--jm-text-muted);
            line-height: 1.6;
        }

        /* Contrast / Comparison Table */
        .comparison-table-wrapper {
            background: #ffffff;
            border-radius: var(--jm-radius-lg);
            border: 1px solid var(--jm-border-color);
            overflow: hidden;
            box-shadow: var(--jm-card-shadow);
        }
        .comparison-table {
            width: 100%;
            margin-bottom: 0;
            border-collapse: separate;
        }
        .comparison-table th {
            background-color: #f8fafc;
            padding: 20px 24px;
            font-weight: 700;
            color: #1e293b;
            border-bottom: 1px solid var(--jm-border-color);
            font-size: 1rem;
        }
        .comparison-table td {
            padding: 18px 24px;
            border-bottom: 1px solid #f1f5f9;
            color: #334155;
            font-size: 0.92rem;
            vertical-align: middle;
        }
        .comparison-table tr:last-child td {
            border-bottom: none;
        }
        .comparison-brand-col {
            background-color: #f0f9ff;
            color: var(--jm-primary-dark) !important;
            font-weight: 600;
        }

        /* Reading Stage Showcase */
        .stage-box {
            background: var(--jm-dark-bg);
            border-radius: var(--jm-radius-lg);
            padding: 40px;
            color: #ffffff;
            border: 1px solid rgba(2, 132, 199, 0.3);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.45);
        }
        .stage-badge {
            background: rgba(0, 242, 254, 0.15);
            color: var(--jm-neon-accent);
            border: 1px solid rgba(0, 242, 254, 0.3);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: inline-block;
        }
        .stage-control-bar {
            background: #0f172a;
            border-radius: 10px;
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border: 1px solid #1e293b;
            margin-top: 24px;
        }
        .stage-switch-item {
            font-size: 0.85rem;
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* 3-Step Process */
        .step-card {
            position: relative;
            background: #ffffff;
            border: 1px solid var(--jm-border-color);
            border-radius: var(--jm-radius-md);
            padding: 30px 24px;
            height: 100%;
            transition: var(--jm-transition);
        }
        .step-card:hover {
            border-color: var(--jm-primary);
            box-shadow: var(--jm-card-shadow-hover);
        }
        .step-index {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--jm-primary) 0%, #0369a1 100%);
            color: #ffffff;
            font-size: 1.15rem;
            font-weight: 800;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .step-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #0f172a;
        }
        .step-desc {
            font-size: 0.9rem;
            color: #64748b;
            line-height: 1.55;
        }

        /* Milestones */
        .timeline-wrapper {
            position: relative;
            padding: 20px 0;
        }
        .timeline-item {
            position: relative;
            padding-left: 36px;
            margin-bottom: 36px;
        }
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: 11px;
            top: 28px;
            bottom: -38px;
            width: 2px;
            background-color: #cbd5e1;
        }
        .timeline-item:last-child::before {
            display: none;
        }
        .timeline-dot {
            position: absolute;
            left: 0;
            top: 2px;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: #ffffff;
            border: 4px solid var(--jm-primary);
            box-shadow: 0 0 0 4px var(--jm-primary-light);
        }
        .timeline-date {
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--jm-primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 4px;
        }
        .timeline-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 8px;
        }
        .timeline-desc {
            font-size: 0.9rem;
            color: #64748b;
            line-height: 1.55;
        }

        /* Collection Directory */
        .category-card {
            background: #ffffff;
            border: 1px solid var(--jm-border-color);
            border-radius: var(--jm-radius-md);
            padding: 24px 20px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            transition: var(--jm-transition);
        }
        .category-card:hover {
            border-color: #38bdf8;
            transform: translateY(-3px);
            box-shadow: var(--jm-card-shadow-hover);
        }
        .cat-icon-box {
            width: 50px;
            height: 50px;
            background: #f1f5f9;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--jm-primary);
            flex-shrink: 0;
        }
        .cat-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 4px;
        }
        .cat-desc {
            font-size: 0.85rem;
            color: #64748b;
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .cat-meta {
            font-size: 0.78rem;
            color: #0284c7;
            font-weight: 600;
        }

        /* Changelog */
        .changelog-box {
            background: #ffffff;
            border: 1px solid var(--jm-border-color);
            border-radius: var(--jm-radius-lg);
            padding: 32px;
            box-shadow: var(--jm-card-shadow);
        }
        .changelog-entry {
            border-bottom: 1px solid #f1f5f9;
            padding-bottom: 20px;
            margin-bottom: 20px;
        }
        .changelog-entry:last-child {
            border-bottom: none;
            padding-bottom: 0;
            margin-bottom: 0;
        }
        .changelog-tag {
            font-size: 0.75rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 4px;
            background: #ecfdf5;
            color: #059669;
            margin-right: 8px;
        }
        .changelog-version {
            font-size: 0.95rem;
            font-weight: 700;
            color: #0f172a;
        }
        .changelog-text {
            font-size: 0.88rem;
            color: #475569;
            margin-top: 8px;
            line-height: 1.55;
        }

        /* Platform Assurance */
        .assurance-item {
            text-align: center;
            padding: 24px 16px;
        }
        .assurance-icon {
            font-size: 2.2rem;
            color: var(--jm-primary);
            margin-bottom: 16px;
        }
        .assurance-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 8px;
        }
        .assurance-desc {
            font-size: 0.88rem;
            color: #64748b;
            line-height: 1.5;
        }

        /* FAQ Accordion */
        .jm-faq-accordion .accordion-item {
            border: 1px solid var(--jm-border-color);
            border-radius: var(--jm-radius-md) !important;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: 0 2px 5px rgba(0,0,0,0.02);
        }
        .jm-faq-accordion .accordion-button {
            font-weight: 700;
            font-size: 1.05rem;
            color: #0f172a;
            padding: 20px 24px;
            background-color: #ffffff;
            box-shadow: none !important;
        }
        .jm-faq-accordion .accordion-button:not(.collapsed) {
            color: var(--jm-primary);
            background-color: #f8fafc;
        }
        .jm-faq-accordion .accordion-body {
            padding: 20px 24px;
            color: #475569;
            font-size: 0.95rem;
            line-height: 1.7;
            background-color: #ffffff;
            border-top: 1px solid #f1f5f9;
        }

        /* Final Action Box */
        .cta-banner {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            border-radius: var(--jm-radius-lg);
            padding: 60px 40px;
            color: #ffffff;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.3);
        }
        .cta-banner-title {
            font-size: 2.3rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cta-banner-desc {
            font-size: 1.05rem;
            color: #94a3b8;
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }

        /* Site Footer */
        .site-footer {
            background-color: var(--jm-dark-bg);
            color: #94a3b8;
            padding: 70px 0 30px;
            border-top: 1px solid #1e293b;
            font-size: 0.9rem;
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 14px;
            display: inline-block;
        }
        .footer-desc {
            color: #64748b;
            font-size: 0.88rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }
        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: #ffffff;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 18px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #94a3b8;
        }
        .footer-links a:hover {
            color: var(--jm-neon-accent);
            padding-left: 4px;
        }
        .footer-bottom {
            margin-top: 50px;
            padding-top: 25px;
            border-top: 1px solid #1e293b;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: #64748b;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.3rem;
            }
            .section-title {
                font-size: 1.9rem;
            }
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 60px 0;
            }
            .hero-title {
                font-size: 1.95rem;
            }
            .hero-magazine {
                padding: 50px 0 40px;
            }
            .magazine-panel {
                margin-top: 40px;
            }
            .kpi-card {
                border-left: none;
                border-top: 3px solid var(--jm-primary);
                margin-bottom: 20px;
            }
            .stage-box {
                padding: 24px;
            }
            .stage-control-bar {
                flex-direction: column;
                gap: 12px;
                align-items: flex-start;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .cta-banner {
                padding: 40px 20px;
            }
            .cta-banner-title {
                font-size: 1.6rem;
            }
        }